Beach days, picnics, and camping trips: these outdoor Summer activities aren't the same without your favorite upbeat tunes buzzing in the background. That's where these eight portable speakers come in. Whether you are looking for something waterproof and inexpensive or want powerful, high-quality sound, there's a portable speaker for every outdoor need. Some contain audio jacks that you can easily plug into your iPhone, iPod, or other MP3 player, while others require a device with built-in Bluetooth (like the iPhone).